Superconducting spin valves based on antiferromagnet/superconductor/antiferromagnet heterostructures
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arXiv
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| Format: | Preprint |
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2024
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| author | Bobkov, G. A. Gordeeva, V. M. Kamra, Lina Johnsen Chourasia, Simran Bobkov, A. M. Kamra, Akashdeep Bobkova, I. V. |
| author_facet | Bobkov, G. A. Gordeeva, V. M. Kamra, Lina Johnsen Chourasia, Simran Bobkov, A. M. Kamra, Akashdeep Bobkova, I. V. |
| contents | Proximity effect at superconductor/antiferromagnet (S/AF) interfaces, which manifests itself as generation of Neel-type triplet correlations, leads to sensitivity of the superconducting critical temperature to the mutual orientation of the AF Neel vectors in AF/S/AF trilayers, which is called the spin-valve effect. Here we predict that the spin-valve effect in AF/S/AF heterostructures crucially depends on the value of the chemical potential of the superconducting interlayer due to the occurrence of the finite-momentum Neel triplet correlations. In addition we investigate equal-spin triplet correlations, which appear in AF/S/AF structures for non-aligned Neel vectors of the AFs, and their role in the nonmonotonic dependence of the superconducting critical temperature of the AF/S/AF structure on the mutual orientation of the AF Neel vectors. The influence of impurities on the spin-valve effect is also investigated. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_16935 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Superconducting spin valves based on antiferromagnet/superconductor/antiferromagnet heterostructures Bobkov, G. A. Gordeeva, V. M. Kamra, Lina Johnsen Chourasia, Simran Bobkov, A. M. Kamra, Akashdeep Bobkova, I. V. Superconductivity Mesoscale and Nanoscale Physics Proximity effect at superconductor/antiferromagnet (S/AF) interfaces, which manifests itself as generation of Neel-type triplet correlations, leads to sensitivity of the superconducting critical temperature to the mutual orientation of the AF Neel vectors in AF/S/AF trilayers, which is called the spin-valve effect. Here we predict that the spin-valve effect in AF/S/AF heterostructures crucially depends on the value of the chemical potential of the superconducting interlayer due to the occurrence of the finite-momentum Neel triplet correlations. In addition we investigate equal-spin triplet correlations, which appear in AF/S/AF structures for non-aligned Neel vectors of the AFs, and their role in the nonmonotonic dependence of the superconducting critical temperature of the AF/S/AF structure on the mutual orientation of the AF Neel vectors. The influence of impurities on the spin-valve effect is also investigated. |
| title | Superconducting spin valves based on antiferromagnet/superconductor/antiferromagnet heterostructures |
| topic | Superconductivity Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2401.16935 |